Шіма Наокі

He is Yusaku's classmate. He loves Dueling, but is not too confident about his skills and had never Dueled in LINK VRAINS, however he eventually overcomes this fear. He is also a fan of Playmaker. He's enthusiastic, passionate, and tries to be friendly with Yusaku. During his observations, Yusaku pointed out that Naoki cannot stand being alone.